Hierarchical nanowire arrays based on carbon nanotubes and Co3O4 decorated ZnO for enhanced photoelectrochemical water oxidation

被引：53
|
作者：
Li, Mu [1 ,2 ]
Chang, Kun [2 ]
Wang, Tao [2 ]
Liu, Lequan [3 ,4 ]
Zhang, Huabin [2 ]
Li, Peng [2 ]
Ye, Jinhua [1 ,2 ,3 ,4 ]
机构：
[1] Hokkaido Univ, Grad Sch Chem Sci & Engn, Sapporo, Hokkaido 0600814, Japan
[2] Natl Inst Mat Sci, Environm Remediat Mat Unit, Int Ctr Mat Nanoarchitecton WPI MANA, Tsukuba, Ibaraki 3050044, Japan
[3] Tianjin Univ, Sch Mat Sci & Engn, TU NIMS Joint Res Ctr, Tianjin 300072, Peoples R China
[4] Collaborat Innovat Ctr Chem Sci & Engn Tianjin, Tianjin 300072, Peoples R China
来源：
JOURNAL OF MATERIALS CHEMISTRY A | 2015年 / 3卷 / 26期
关键词：
OXYGEN EVOLUTION; PHOTOANODE; FILM; NANOPARTICLES; ELECTRODE; COBALT; FABRICATION; EFFICIENCY; CATALYST; NANORODS;
D O I：
10.1039/c5ta02901e
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
A highly enhanced activity for photoelectrochemical water splitting was achieved by fabricating carbon nanotube (CNT) and Co3O4 decorated hierarchical ZnO nanowire (NW) arrays via a facile stepwise synthesis strategy. The ternary CNT-ZnO-Co3O4 NW composite exhibits an increased photocurrent density (1.9 mA cm(-2) at 0.6 V vs. Ag/AgCl, 2.7 times larger than that of the pristine ZnO NWs) and improved incident photon to current conversion efficiency (52.5% at 340 nm, 5.1 times higher than that of the pristine ZnO NWs) as a photoanode under AM 1.5G simulated sunlight. This enhancement is attributed to the specific heterogeneous ternary architecture, which results in promoted electron-hole charge separation and transfer, decreased water oxidation overpotential as well as increased reaction rates of water splitting by decorating ZnO NWs with CNTs and Co3O4.
引用
收藏
页码：13731 / 13737
页数：7
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